package br.com.dsa.sistemavendas.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.hibernate.SessionFactory;

import br.com.dsa.sistemavendas.HibernateUtil;

public class ConexaoHibernateFilter implements Filter{

	private SessionFactory sf;	
	
	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest sevletfilter, ServletResponse serveletResponse,
			FilterChain chain) throws IOException, ServletException {

		try {
			
			this.sf.getCurrentSession().beginTransaction();
			chain.doFilter(sevletfilter, serveletResponse);
			this.sf.getCurrentSession().getTransaction().commit();
			this.sf.getCurrentSession().close();			
			
		} catch (Exception  trw) { //} catch (Throwable trw) {
				
			trw.printStackTrace();
			
			try {
				
				if (this.sf.getCurrentSession().getTransaction().isActive()) {
					this.sf.getCurrentSession().getTransaction().rollback();
				}
				
			} catch (Exception e) {
				e.printStackTrace();
			}
		
			throw new ServletException(trw.getMessage()); 
		}
				
	}

	@Override
	public void init(FilterConfig conf) throws ServletException {

		this.sf = HibernateUtil.getSession();
	}

}
